19. speed humps and speed tables are effective speed reduction measures because a. they allow traffic to proceed at the speed limit. b. speeders will launch off the far end and land hard, possibly damaging their vehicle. c. both a& b

The correct answer is option  A. they allow traffic to proceed at the speed limit.

The speed humps or the speed tables are present on the roads in order to maintain the speed of the vehicles passing by. The presence of the speed bumps force the vehicles to reduce their speed before passing, which allow the traffic to be present in a limited speed and also decrease the potential chances of the crashes.

in a word, a scientific question is testable. a testable question is one that asks about objects, organisms or events found in the world around it